Use group creation without explicit array declaration, as that's been supported all along.

examples/Scripts/BouncingBalls.html

@@ -41,7 +41,7 @@
 				overlayColor.alpha = 0.5;
 				var overlayGradient = new Gradient([new RgbColor(1, 1, 1, 0.5), new RgbColor(1, 1, 1, 1)]);
 				overlay.fillColor = new GradientColor(overlayGradient, overlayPos, overlayPos + this.radius / 2);
-				this.item = new Group([compound, overlay]);
+				this.item = new Group(compound, overlay);
 			},
 
 			iterate: function() {

examples/Tools/Vektor.html

@@ -49,14 +49,14 @@
 		items = [];
 		var arrowVector = vector.normalize(10);
 		var end = vectorStart + vector;
-		vectorItem = new Group([
+		vectorItem = new Group(
-			new Path([vectorStart, end]),
+			new Path(vectorStart, end),
-			new Path([
+			new Path(
 				end + arrowVector.rotate(135),
 				end,
 				end + arrowVector.rotate(-135)
-			])
+			)
-		]);
+		);
 		vectorItem.strokeWidth = 0.75;
 		vectorItem.strokeColor = '#e4141b';
 		// Display:

src/item/Group.js

@@ -73,8 +73,7 @@ var Group = this.Group = Item.extend(/** @lends Group# */{
 		// Allow Group to have children and named children
 		this._children = [];
 		this._namedChildren = {};
-		this.addChildren(!items || !Array.isArray(items)
+		this.addChildren(Array.isArray(items) ? items : arguments);
-				|| items.length && typeof items[0] !== 'object' ? arguments : items);
 	},
 
 	_changed: function(flags) {

src/item/Item.js

@@ -1157,7 +1157,7 @@ function(name) {
 	 * its children list. You can use this function for groups, compound
 	 * paths and layers.
 	 *
-	 * @param {item[]} items The items to be added as children
+	 * @param {Item[]} items The items to be added as children
 	 */
 	addChildren: function(items) {
 		this.insertChildren(this._children.length, items);

src/path/CompoundPath.js

@@ -48,9 +48,7 @@ var CompoundPath = this.CompoundPath = PathItem.extend(/** @lends CompoundPath#
 		this._namedChildren = {};
 		// Do not reassign to paths, since arguments would get modified, which
 		// we potentially use as array, depending on what is passed.
-		var items = !paths || !Array.isArray(paths)
+		this.addChildren(Array.isArray(paths) ? paths : arguments);
-				|| typeof paths[0] !== 'object' ? arguments : paths;
-		this.addChildren(items);
 	},
 
 	insertChild: function(index, item) {

src/svg/SvgImport.js

@@ -310,7 +310,7 @@ new function() {
 			// http://www.w3.org/TR/SVG/masking.html#ClipPathProperty
 			case 'clip-path':
 				var clipPath = getDefinition(value).clone().flatten(),
-					group = new Group([clipPath]);
+					group = new Group(clipPath);
 				group.moveAbove(item);
 				group.addChild(item);
 				group.setClipped(true);